Thought I'd post a few pics of my little stream tank I built for my darters. I go out every June here in Northwestern Pennsylvania and collect them. Always keep a few of the best ones. They really do surprisingly well in captivity, I feed mine a combination of mysis, bloodworms, and spirulina brine shrimp. They will even eat flake! I set up a 20 long with a 1.5" bulkhead draining to a 15 gallon tall sump. I crank 525 gph through the tank to simulate a stream. Flow is end to end from a home-made spray bar. The darters love it!